package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 * 自定义填充
 */
@Aspect
@Component
@Slf4j
public class AutoFillAspect {

    /**
     * PointCut
     */
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCur() {}

    /**
     * 前置通知
     * @param joinPoint
     */
    @Before("autoFillPointCur()")
    public void autoFill(JoinPoint joinPoint) {
        log.info("update and insert will be autofilled");

    //获得数据库操作类型
        //获得签名
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        //通过签名获得注解
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);
        //通过注解获得操作类型
        OperationType operationType = autoFill.value();
    //获得方法参数

        Object[] args = joinPoint.getArgs();

        if(args==null || args.length==0)return ;
        Object entity = args[0];
    //注射
        if(operationType == OperationType.INSERT){
            try {
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setCreateTime.invoke(entity, LocalDateTime.now());
                setUpdateTime.invoke(entity, LocalDateTime.now());
                setCreateUser.invoke(entity, BaseContext.getCurrentId());
                setUpdateUser.invoke(entity,       BaseContext.getCurrentId());
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }else{
            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setUpdateTime.invoke(entity, LocalDateTime.now());
                setUpdateUser.invoke(entity, BaseContext.getCurrentId());
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }

    }

}
